11022221221021 has 16 divisors (see below), whose sum is σ = 11143890750960. Its totient is φ = 10900992901120.

The previous prime is 11022221221019. The next prime is 11022221221057. The reversal of 11022221221021 is 12012212222011.

It can be written as a sum of positive squares in 8 ways, for example, as 723988265625 + 10298232955396 = 850875^2 + 3209086^2 .

It is a cyclic number.

It is not a de Polignac number, because 11022221221021 - 2¹ = 11022221221019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11022221221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022221228021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142623531 + ... + 142700791.

It is an arithmetic number, because the mean of its divisors is an integer number (696493171935).

Almost surely, 2^{11022221221021} is an apocalyptic number.

It is an amenable number.

11022221221021 is a deficient number, since it is larger than the sum of its proper divisors (121669529939).

11022221221021 is a wasteful number, since it uses less digits than its factorization.

11022221221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80096.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11022221221021 its reverse (12012212222011), we get a palindrome (23034433443032).

The spelling of 11022221221021 in words is "eleven trillion, twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-one".